/* ================================================
   XYZ — Home page
   ================================================ */

/* ─── Canvas cosmos ─── */

#cosmos {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ─── Nav (home: empieza transparente) ─── */

.home .nav-logo,
.home .nav-links {
  opacity: 0;
  animation: fadeIn 0.6s ease forwards;
  animation-delay: 3.6s;
}

/* ─── Hero ─── */

.hero {
  position: relative;
  z-index: 1;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hero-identity {
  opacity: 0;
  transform: translateY(12px);
}

.hero-identity.visible {
  animation: fadeInUp 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero-xyz {
  font-family: var(--font-display);
  font-size: clamp(6rem, 22vw, 17rem);
  font-weight: 300;
  letter-spacing: 0.08em;
  line-height: 0.88;
  color: var(--text);
}

.hero-name {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-top: 1.1rem;
}

.hero-tagline {
  margin-top: 2.6rem;
  font-family: var(--font-display);
  font-size: clamp(0.95rem, 2.2vw, 1.25rem);
  font-weight: 300;
  font-style: italic;
  color: var(--text-muted);
  line-height: 1.65;
  opacity: 0;
  transform: translateY(12px);
}

.hero-tagline.visible {
  animation: fadeInUp 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* ─── Scroll cue ─── */

.scroll-cue {
  position: absolute;
  bottom: 2.8rem;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0;
  animation: fadeIn 0.6s ease forwards;
  animation-delay: 4.2s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
}

.scroll-cue-label {
  font-size: 0.58rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-subtle);
}

.scroll-cue-line {
  display: block;
  width: 1px;
  height: 44px;
  background: linear-gradient(to bottom, transparent, var(--text-muted));
  animation: scrollPulse 2.2s ease infinite;
}

@keyframes scrollPulse {
  0%   { opacity: 0; transform: scaleY(0); transform-origin: top; }
  40%  { opacity: 1; transform: scaleY(1); transform-origin: top; }
  60%  { opacity: 1; transform: scaleY(1); transform-origin: bottom; }
  100% { opacity: 0; transform: scaleY(0); transform-origin: bottom; }
}

/* ─── Transición del canvas al contenido ─── */

.hero-fade {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 200px;
  background: linear-gradient(to bottom, transparent 0%, rgba(0,0,0,0.6) 50%, var(--bg) 100%);
  z-index: 2;
  pointer-events: none;
}

/* ─── Secciones de contenido ─── */

.content-section {
  position: relative;
  z-index: 2;
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: var(--s6) 0;
}

/* ─── Sobre XYZ ─── */

.xyz-quote {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.6rem);
  font-weight: 300;
  font-style: italic;
  line-height: 1.25;
  color: var(--text);
  margin-bottom: var(--s4);
  max-width: 680px;
}

.xyz-description {
  font-size: 0.93rem;
  color: var(--text-muted);
  max-width: 520px;
  line-height: 1.9;
}

.xyz-note {
  margin-top: var(--s2);
  font-family: var(--font-display);
  font-size: 1rem;
  font-style: italic;
  color: var(--text-subtle);
}

/* ─── Principios ─── */

.principios-list {
  list-style: none;
}

.principio-item {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: var(--s2);
  padding: var(--s3) 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}

.principio-item:first-child {
  border-top: 1px solid var(--border);
}

.principio-num {
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  color: var(--text-subtle);
  padding-top: 0.3rem;
}

.principio-titulo {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 400;
  display: block;
  margin-bottom: 0.2rem;
  line-height: 1.2;
}

.principio-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ─── Dimensiones ─── */

.dimensiones-intro {
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 460px;
  line-height: 1.85;
  margin-bottom: var(--s5);
}

.dimensiones-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.dim-card {
  background: var(--bg);
  padding: 2.4rem 2rem;
  display: block;
  transition: background var(--ease);
  position: relative;
  overflow: hidden;
}

.dim-card-accent {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  opacity: 0;
  transition: opacity var(--ease);
}

.dim-card[data-dim="constelaciones"] .dim-card-accent { background: var(--constelaciones-light); }
.dim-card[data-dim="habitat"]         .dim-card-accent { background: var(--habitat-light); }
.dim-card[data-dim="informatica"]     .dim-card-accent { background: var(--informatica-light); }
.dim-card[data-dim="giranada"]        .dim-card-accent { background: var(--giranada-light); }

.dim-card:hover { background: rgba(255,255,255,0.025); }
.dim-card:hover .dim-card-accent { opacity: 1; }

.dim-card-num {
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  color: var(--text-subtle);
  display: block;
  margin-bottom: var(--s3);
}

.dim-card-title {
  font-family: var(--font-display);
  font-size: 2.1rem;
  font-weight: 300;
  line-height: 1;
  margin-bottom: 0.3rem;
}

.dim-card-sub {
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--s2);
}

.dim-card-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: var(--s3);
}

.dim-card-arrow {
  font-size: 1rem;
  color: var(--text-muted);
  transition: transform var(--ease), color var(--ease);
  display: inline-block;
}

.dim-card:hover .dim-card-arrow {
  transform: translateX(5px);
  color: var(--text);
}

/* ─── Intersecciones ─── */

.intersecciones-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--s2);
  margin-top: var(--s4);
}

.interseccion-item {
  border: 1px solid var(--border);
  padding: var(--s3);
}

.interseccion-label {
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-subtle);
  margin-bottom: var(--s1);
  line-height: 1.6;
}

.interseccion-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ─── Responsive ─── */

@media (max-width: 768px) {
  .hero-xyz {
    font-size: clamp(5rem, 28vw, 9rem);
  }

  .dimensiones-grid {
    grid-template-columns: 1fr;
  }

  .intersecciones-grid {
    grid-template-columns: 1fr;
  }

  .content-section {
    padding: var(--s5) 0;
  }
}